Why not just snort methamphetamine? It's probably cheaper. I know a couple of guys who claimed that meth really improved their concentration and made it possible to stay up for days at a time getting all kinds of stuff done. Of course, then their lives fell apart. They lost everything and one of them ended up in prison. But, hey, it worked for a while.
Messing around with stimulant drugs is just dumb. It's fine if you want to blow your life. The problem begins when you start messing around with the lives of others. I hope you find a way out of your substance abuse problem before you have any responsibility for patient care.